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Q. No.

Which step in the decomposition of detritus is carried out by bacteria and fungi?
1. fragmentation 2. leaching
3. catabolism 4. mineralisation

Subtopic:  Decomposition |
 69%
Level 2: 60%+
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The consumers that feed on herbivores are correctly described as:
1. Primary producers
2. Primary consumers
3. Secondary carnivores
4. Secondary consumers
Subtopic:  Energy Flow |
 62%
Level 2: 60%+
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Out of the total cost of various ecosystem services, which of the following accounts for maximum per cent?
1. nutrient cycling
2. soil formation
3. climate regulation
4. recreation
 75%
Level 2: 60%+
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The annual net primary productivity of the whole biosphere is approximately 170 billion tons (dry weight) of organic matter. Of this, the productivity of the oceans is:
1. 55 billion tons.
2. 70 billion tons.
3. 100 billion tons.
4. 120 billion tons.
Subtopic:  Ecosystem Productivity |
 89%
Level 1: 80%+
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What percent of the total incident solar radiation is captured by plants?
1. 1 to 5 2. 2 to 10
3. 20 to 30 4. 40 to 60
Subtopic:  Energy Flow |
Level 3: 35%-60%
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In ecological succession:
1. Hydrarch succession leads to xeric conditions.
2. Xerarch succession leads to hydric conditions.
3. Both xerarch and hydrarch successions may lead to either xeric or hydric conditions.
4. Both xerarch and hydrarch successions lead to mesic conditions.
 85%
Level 1: 80%+
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Consider the given two statements:
Assertion (A): Heterotrophs generally have high energy conversion efficiencies when compared to those of plants.
Reason (R): At higher trophic levels, the respiratory costs are dramatically reduced.
 
1. (A) is True but (R) is False
2. Both (A) and (R) are True and (R) correctly explains (R)
3. Both (A) and (R) are True but (R) does not correctly explain (A)
4. Both (A) and (R) are False
Subtopic:  Energy Flow |
 52%
Level 3: 35%-60%
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Rate of formation of new organic matter by consumers is called as:
1. Gross primary productivity
2. Net primary productivity
3. Secondary productivity
4. Tertiary productivity
Subtopic:  Ecosystem Productivity |
 85%
Level 1: 80%+
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Consider the two given statements:

Assertion (A): Secondary succession is faster than the primary succession.
Reason (R): Soil is already there at the time of secondary succession.

1. Both (A) and (R) are True and (R) correctly explains the (A)
2. (A) is True but (R) is False
3. (A) is False but (R) is True
4. Both (A) and (R) are True but (R) does not correctly explain (A)
 89%
Level 1: 80%+
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In the equation 

GPP is Gross Primary Productivity. NPP is net Primary Productivity. R here is ___________
1. Reproductive allocation 
2. Photosynthetically active radiation 
3. Respiratory quotient 
4. Respiratory loss
Subtopic:  Ecosystem Productivity |
 89%
Level 1: 80%+
NEET - 2023
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